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Technique for comprehensive utilization clean production of phosphorus block ore and extracting rare earth form the phosphorus block ore

A phosphorite and clean technology, applied in the field of rare earth extraction, achieves high recycling rate, reduced process production cost and environmental treatment cost, and high product purity

Inactive Publication Date: 2008-05-28
贵州蓝天科大矿业发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the rare earth elements are concentrated in collophosphine and apatite. According to the technological characteristics of the ore, the rational use of mineral resources and the appropriate mineral cleaning treatment process have not been reported so far.

Method used

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  • Technique for comprehensive utilization clean production of phosphorus block ore and extracting rare earth form the phosphorus block ore
  • Technique for comprehensive utilization clean production of phosphorus block ore and extracting rare earth form the phosphorus block ore
  • Technique for comprehensive utilization clean production of phosphorus block ore and extracting rare earth form the phosphorus block ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Unless otherwise specified, the percentages involved in the following examples are all mass percentages.

[0044] Follow the steps below:

[0045] Step (1) According to the conventional wet-process phosphoric acid production process, take 10Kg of phosphorite concentrate, crush it to 100 mesh, and add it at a reaction temperature of 80±5°C at a ratio of 4:1 to liquid-solid ratio (mass ratio) 40kg of phosphoric acid with a concentration of 20wt% to 23wt% was reacted, and the reaction time was 2 hours; then, concentrated sulfuric acid with a concentration of at least 97% was added to continue the reaction, and the amount added was until the SO in the liquid phase 3 The concentration is 35±2g / L, and the reaction time is 5 hours. After the reaction is complete, filter to obtain crude phosphoric acid and phosphogypsum. The crude phosphoric acid solution concentration (P 2 o 5 ) is 29%; concentrate decomposition rate is 98%; P 2 o 5 The extraction rate is 96%; the extract...

Embodiment 2

[0060] Follow the steps below:

[0061] Step (1) According to the process of conventional wet phosphoric acid production, take 20Kg of phosphorite concentrate, crush it to 100 mesh, and add 80kg concentration React with 21wt% phosphoric acid, and the reaction time is about 2 hours; then add concentrated sulfuric acid with a concentration of at least 97% to continue the reaction, until the amount of SO in the liquid phase is 3 The concentration is 35±2g / L, and the reaction time is about 5 hours. After the reaction is complete, filter to obtain crude phosphoric acid and phosphogypsum. The crude phosphoric acid solution concentration (P 2 o 5 ) is 27.5%; concentrate decomposition rate is 98%; P 2 o 5 The extraction rate is 96%; the extraction rate of rare earth oxide is 43.1%.

[0062] (2) the crude phosphoric acid obtained in the step (1) is evaporated and concentrated, and fluorine and silicon are reclaimed from the escaped gas through a conventional process to obtain hydr...

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Abstract

The invention relates to a technology for carrying on comprehensive utilization and clean production of phosphorus rock mine and extracting rare earth from the phosphorus rock mine. By improving the existing technology for extracting phosphoric acid in wet method, the technology process of the invention can be carried on further treatment through the recovering and treating process of normal fluorine and silicon, thereby realizing precipitate of rare-earth microcosmic salt and achieving single rare-earth products by further normal treatment. Simultaneously, phosphogypsum in the existing technique is used through recycling and deep processing, thereby achieving the purpose of clean production. The invention has the advantages that the clean production can be achieved with relatively low cost, rare-earth element in mineral products is fully recycled, and the realization of industrial production and the deepening of the comprehensive utilization of the phosphogypsum are easily achieved.

Description

technical field [0001] The invention relates to a process for comprehensively utilizing clean production of phosphorite ore and extracting rare earth therefrom. Through the improvement of the existing wet extraction phosphoric acid process, the process flow of the present invention can be further processed through the conventional fluorine and silicon recovery process, so as to obtain rare earth phosphate precipitation, and then obtain a single rare earth product through further conventional processing, At the same time, the waste phosphogypsum in the prior art is recycled and further processed, so as to achieve the purpose of clean production. Background technique [0002] Phosphorus is an important non-metallic mineral resource that is difficult to regenerate, and it is also one of the most important elements in life. It not only has important application value in many industries, but also plays an important role in agriculture, medicine, and biology. . my country's phos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/00C22B3/06C22B3/08C22B3/20C22B3/26C22B3/44C22B59/00C01B25/18
CPCY02P10/20
Inventor 杨启山鲁毅强曹艳秋高丽娟张长鑫
Owner 贵州蓝天科大矿业发展有限公司
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